Exactly --- a fly-by of everything in the asteroid belt for example would be a budget-buster --- what is there in the belt which it would be interesting to have photos of?
My high score!! Or we could see which asteroid Han Solo is hiding the Millennium Falcon in. Or we could see all of the illegal mining operations by those pesky guys from Plural Zed Alpha Nine Nine.
We don't know what we won't see until we don't see it.